Perhaps you should try some spelling variations:
petroiiv » petrov (Expand Search), peteroiiv (Expand Search), petrioiiv (Expand Search), petruoiiv (Expand Search)
peterui » peterdi (Expand Search)
petruiv » peteruiv (Expand Search), petriuiv (Expand Search), petruuiv (Expand Search)
petroiuuo » peteroiuuo (Expand Search), petrioiuuo (Expand Search), petruoiuuo (Expand Search)
petruiuuo » peteruiuuo (Expand Search), petriuiuuo (Expand Search), petruuiuuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((petruiv OR petroiiv) OR (((peteri OR peterui) OR (petroiuuo OR petruiuuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruiv OR petroiiv) OR (((peteri OR peterui) OR (petroiuuo OR petruiuuo)) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruiv OR petroiiv) OR (((peteri OR peterui) OR (petroiuuo OR petruiuuo)) OR petr)) o.s.*.